Alexander l



WRENGH.

N0. 511,190. Patented De o. 19, 1893.

UNITED STATES PATENT OFFICE.

ALEXANDER L. BEDFORD, OF S'I. LOUIS, MISSOURI, ASSIGNOR en -ONE-HALF TWILLIAM.J. WAL KER en SAME PLACE.

WRENCH.

SPECIFICATON foicming part of Letters Patent 511,190, dated. December19, 1893.

Appiication ii1ed Octoler 5,1893. Serial No. 487,235. (Nu model.)

T0 a ZZ whom it may concern:

Be itknown t hat I,ALEXANDER L BEDFORD, a. citizen of the United Stales,residing in the city of St. Louis, State of Missenri, have in vented acertain new and nsefnl Improve ment in W'renehes, 0f whieh tliefoll0wing is a full, clear, and exact description, reference being hadto the accornpanyi'ng drawings, forming a part of this specification,wherein ro like symbols refer to like parts wherever they 0130111, andin whicl1-- Figure 1 is aperspective view of my imprevedwreneh. Fig. 2is a detail view in side elevarion, showing tl1e sliding jaw in sec- [5tien. Fig. 3 is adetail perspeetive view of the sliding jaw, with thetooth ed-plate removed.

1\Iy iuvention relateste anew and nseful imprevement inwrenehes, andconsists in the peenliar consitruetion, arrangement, and com- 2obination of the several pairts, all as will hereinafter be describedanti afierw a.rd pointed out in the claims.

Referringto the drawings, A indieaies 'the rigid jaw; B, the toethed 0xronghened sha.nk; and 0, the handie; all nf said parts being of ordinaryo approved constrnction D represents the sliding jaw, eored, as shown,for the passage of the shank therathrengh, which eore is of snchdimensions as to prevent iateral play, but permit the sliding jaw to betilted er canted in such manner as te disengage the teeth of the toethedplate E, whieh is earried thereby, from 'cl1e teeth 011 the shank. Onthefllower rear edge of this sliding jaiv D,I preferably form a lug orprejection D, throngh the medium of which the ogerater aan move timesliding jaw b ackward, at the: Same time tilting the sameto disengagethe teeth on the toethed plate Efrori1 the teeth on the shank, andpermit he face of the In};

'01 projeetion al te ride over the teeth on-the shank without mntilatingthe same.

The toothed plate E, heretofe e referred to, is pmferably in the fo1 mof a the teil of Whigl1 is introdnced in the cre s0 as to ferm roneofthe wlls thexeof, its teeth being ex terior. I preferably insert apinethrengh the side yvalls. of the sliding jaw and the of tixe toothedplate E, through the medium of whieh pin thepiate is retained inposition,

-end, by the removul of whieh, the plate may be removed and anotherinserted, shonld its teeth become wrn s0 as to refnse to bite the sha.nkand held the sliding jaw te. its work The cross of this T-shaped platepreferably finds a seat in recesses d in the inner side walls of thesliding jaw, wh ieh constrnction tends to add rigidity te tl1e parts.Riveted, or etherwse secnred, to the wall of the s liding3aw, oppositetl1is teothd plate, is a spnmg F, preferably of a ferm commonly known asa. strap 01 leaf spring, wl1ich spring exertsa pressnre uponthe shank B,so as te force the teel1 of the plate E into engagement with. the teethen tlxe shank, there being'snficient toom in 6 the e0re to permit thisspring to play pmpe rl y.

Iiorce the sliding ja w toward the 11g1d jaw, it is only neeessary toslide the same on the shank, when the teeth on the shank and the tnothedpleite will vide past eaeh ether, oliferifig no obstruetion orresistance. I ew ever, whenthe jaws are in operative POSIlOH a.ndpressnre is placed thereupon,-the act on of the sliding jaw will be totilt in the direet1on of the toothed plate, whieh will tend t0 bind thesliding jaw en the shank more tightly.

When it is desired to inerease the span of the jaws, il: is onlynecessary topnll upon the projection 01 t1igger D, whieh will tilt thesliding jaw D inwardly against the aet1on of Sq tl1e spring F anddisengage the teetl1 of the plate E so that the sliding jaw will rideupon the teeth on the shank thrnngh the medium of the smooth surface cl,said surface aeting as & fnlcrum-also, as a weer snrface. 8 5 Havingfilms (leseribed my invention,l declare thal; what I claim is- 1. In &wrench, tl1e combination with the rigid ja.w and too thed 01 roughenedshank,ef

a sliding ja.w, cored fer the passage of said 0 shank, a teothed pla.teremovably secnredin and fermingone of the wa lls fsai d eore, said'toethed platze being in the form of a T, the .erossbar of which issea.ted in recesses in the sidewalls of the jaw, and a, spring, secnredin ihe eore, formin g en opposite yieldin g wall thereof, fox holdingthe toothed plate in en gagenzuantwith the shank, snbstantially asdeseribed.

2. In a wrench, ti1e con1bination with the 10e rigid jaw Aand toothed 01ronghened shank B, of the sliding jaw D providedwith the

